Good evening and greetings,

I'm trying to change the power steering pump. The pulley is resisting all efforts to budge: levering hard against the pump body, enough to flex the pulley but it's not releasing.
Left for the night liberally coated in penetrating oil.

Workshop manual. Ha ha ha. Like the pulley will fall off if you take the bolts out..

Well stuck on

Behind the pulley

I would love to hear how to get this off from anyone who has changed the pump.

Thanks
Steve




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Can you take the pump off with the pulley still attached?

 

I don't think so, bolts behind the pulley.

 

Serpentine belt replaced to keep the pulley still with the application of a cold chisel, a bigger hammer and rotating to a new place gradually pushed it off.
Can now access the fixing bolts.

Top front fixing

Side front fixing

One other bolt to the rear at top will probably require contortions.
In case anyone else does this job: The fluid-out pipe needs a cut down 22mm ring spanner to get in the space.

 

I see you have the three retaining bolts off.
What you need to do now is pull the pulley, evenly, with a proper puller.
I don’t believe the centre bolt is removed. (at least not on an oem pump).
Interesting though…. the pump is a very robust unit. I am surprised it needs swapping out… unless of course the fluid has never been changed.

 

lol, we crossed posted.

 

Agree. an even pull is essential and i was considering making up a simple puller to engage the three holes. However, a bigger hammer and chisel and repeatedly turning the pulley to a new position gradually done the job.

Why change the pump...
The car is quite new to me and the steering has become gradually heavier over the year particularly turning quickly at parking speeds. I've been trying to find a solution.
It's not a slipping belt or leak or pipe blockage, and i checked the voltage and current were present at the servotronic transducer.
Shortly after acquiring the car I noticed the pas fluid smelt burnt and was slightly brown, could the previous owner have overheated the pump. I read that is quite possible if steerings held on full lock for long. The workshop manual says 10 secs! I done a fluid flush, though it made no difference to the steering.
Last week, what little power assistance there was completely disappeared.

Maybe I could have sorted out a pressure test to eliminate or verify the cause but I figured the cost would be comparable to a new pump anyway.
So, I'm not sure a new pump will fix it but hoping!
Keeping my fingers crossed.

 

Give a really good flush of the rack??

 

Very pleased this evening.
The new pump is in and vacuum bled, and pipe connections look dry after a run.
An absolute driving transformation.

I'm surprised the old one deteriorated so quickly, just 1000 miles from first thinking it's needing a bit of a heave occasionally to being as hard work as non assisted truck.
It's a ZF pump, probably original fit 80000 miles ago.
Fitted a Bosch pump, I think they now own ZF.

If anyone is thinking of changing the pump, it's in a very tight space and only just possible to manoeuvre past the thermostat and I also needed to remove the central air intake section to remove it.
Generally I followed the workshop procedure.
The fluid delivery hose from the reservoir follows a very tight route; I attached a rope to the reservoir end that pulled through it's route during removal, and later to help tug it back through upon re-installation.
Also, I found the reservoir hoses are easier to remove and replace from within the wheel arch.

Now looking forward to tomorrows trip to Weymouth along the coast road.